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pulse-daemon.conf(5)					  pulse-daemon.conf(5)

NAME
       pulse-daemon.conf - PulseAudio daemon configuration file

SYNOPSIS
       ~/.config/pulse/daemon.conf

       /etc/pulse/daemon.conf

DESCRIPTION
       The  PulseAudio sound server reads configuration directives from a file
       ~/.config/pulse/daemon.conf on startup and when that file doesn't exist
       from  /etc/pulse/daemon.conf.  Please note that the server also reads a
       configuration script on startup default.pa which also contains  runtime
       configuration directives.

       The configuration file is a simple collection of variable declarations.
       If the configuration file parser encounters either ; or	#  it  ignores
       the rest of the line until its end.

       For  the settings that take a boolean argument the values true, yes, on
       and 1 are equivalent, resp. false, no, off, 0.

GENERAL DIRECTIVES
       daemonize=  Daemonize after startup. Takes a boolean value, defaults to
       no. The --daemonize command line option takes precedence.

       fail=  Fail  to	start up if any of the directives in the configuration
       script default.pa fail. Takes a boolean argument, defaults to yes.  The
       --fail command line option takes precedence.

       allow-module-loading= Allow/disallow module loading after startup. This
       is a security feature that if disabled makes sure that no further  mod‐
       ules  may be loaded into the PulseAudio server after startup completed.
       It is recommended to disable  this  when	 system-instance  is  enabled.
       Please  note that certain features like automatic hot-plug support will
       not work if this option is enabled. Takes a boolean argument,  defaults
       to  yes. The --disallow-module-loading command line option takes prece‐
       dence.

       allow-exit= Allow/disallow exit on user request. Defaults to yes.

       resample-method= The resampling algorithm to use. Use one of  src-sinc-
       best-quality,   src-sinc-medium-quality,	  src-sinc-fastest,  src-zero-
       order-hold, src-linear, trivial, speex-float-N, speex-fixed-N,  ffmpeg.
       See  the	 documentation	of libsamplerate and speex for explanations of
       the different src- and speex- methods, respectively. The method trivial
       is  the	most  basic algorithm implemented. If you're tight on CPU con‐
       sider using this. On the other hand it has the worst  quality  of  them
       all.  The Speex resamplers take an integer quality setting in the range
       0..10 (bad...good). They exist in two flavours: fixed  and  float.  The
       former  uses  fixed  point numbers, the latter relies on floating point
       numbers. On most desktop CPUs  the  float  point	 resampler  is	a  lot
       faster,	and  it also offers slightly better quality. See the output of
       dump-resample-methods for a complete list of all available  resamplers.
       Defaults	 to  speex-float-1.  The --resample-method command line option
       takes precedence. Note that some modules overwrite or allow overwriting
       of the resampler to use.

       enable-remixing= If disabled never upmix or downmix channels to differ‐
       ent channel maps.  Instead,  do	a  simple  name-based  matching	 only.
       Defaults to yes.

       enable-lfe-remixing= If disabled when upmixing or downmixing ignore LFE
       channels. When this option is disabled the output LFE channel will only
       get  a  signal  when  an	 input LFE channel is available as well. If no
       input LFE channel is available the output LFE channel will always be 0.
       If no output LFE channel is available the signal on the input LFE chan‐
       nel will be ignored. Defaults to no.

       use-pid-file= Create a PID file in  the	runtime	 directory  ($XDG_RUN‐
       TIMEDIR/pulse/pid). If this is enabled you may use commands like --kill
       or --check. If you are planning	to  start  more	 than  one  PulseAudio
       process	per  user, you better disable this option since it effectively
       disables multiple instances. Takes a boolean argument, defaults to yes.
       The --use-pid-file command line option takes precedence.

       cpu-limit=  If  disabled	 do  not install the CPU load limiter, even on
       platforms where it is supported. This  option  is  useful  when	debug‐
       ging/profiling  PulseAudio to disable disturbing SIGXCPU signals. Takes
       a boolean argument, defaults to no.  The	 --no-cpu-limit	 command  line
       argument takes precedence.

       system-instance=	 Run the daemon as system-wide instance, requires root
       privileges. Takes a boolean argument, defaults to no. The --system com‐
       mand line argument takes precedence.

       local-server-type=  Please  don't use this option if you don't have to!
       This option is currently only useful when you want D-Bus clients to use
       a  remote server. This option may be removed in future versions. If you
       only want to run PulseAudio in the system mode, use the system-instance
       option.	This option takes one of user, system or none as the argument.
       This is essentially a duplicate for  the	 system-instance  option.  The
       difference  is  the none option, which is useful when you want to use a
       remote server with D-Bus clients. If both this and system-instance  are
       defined, this option takes precedence. Defaults to whatever the system-
       instance is set.

       enable-shm= Enable data transfer via POSIX shared memory. Takes a bool‐
       ean  argument, defaults to yes. The --disable-shm command line argument
       takes precedence.

       shm-size-bytes= Sets the shared memory segment size for the daemon,  in
       bytes.  If left unspecified or is set to 0 it will default to some sys‐
       tem-specific default, usually 64 MiB. Please note that usually there is
       no  need to change this value, unless you are running an OS kernel that
       does not do memory overcommit.

       lock-memory= Locks the entire PulseAudio	 process  into	memory.	 While
       this might increase drop-out safety when used in conjunction with real-
       time scheduling this takes away a lot of memory	from  other  processes
       and might hence considerably slow down your system. Defaults to no.

       flat-volumes=  Enable  'flat' volumes, i.e. where possible let the sink
       volume equal the maximum of the volumes of the inputs connected to  it.
       Takes a boolean argument, defaults to yes.

SCHEDULING
       high-priority=  Renice the daemon after startup to become a high-prior‐
       ity process. This a good idea if you experience drop-outs during	 play‐
       back.  However,	this  is a certain security issue, since it works when
       called SUID root only, or RLIMIT_NICE is used. root is dropped  immedi‐
       ately  after  gaining  the nice level on startup, thus it is presumably
       safe. See pulseaudio(1) for more information. Takes a boolean argument,
       defaults	 to  yes. The --high-priority command line option takes prece‐
       dence.

       realtime-scheduling= Try to acquire SCHED_FIFO scheduling  for  the  IO
       threads.	 The same security concerns as mentioned above apply. However,
       if PA enters an endless	loop,  realtime	 scheduling  causes  a	system
       lockup.	Thus,  realtime	 scheduling  should only be enabled on trusted
       machines for now. Please not that only the IO threads of PulseAudio are
       made  real-time.	 The  controlling  thread is left a normally scheduled
       thread. Thus enabling  the  high-priority  option  is  orthogonal.  See
       pulseaudio(1)  for more information. Takes a boolean argument, defaults
       to yes. The --realtime command line option takes precedence.

       realtime-priority= The realtime priority to acquire, if realtime-sched‐
       uling is enabled. Note: JACK uses 10 by default, 9 for clients. Thus it
       is recommended to choose the  PulseAudio	 real-time  priorities	lower.
       Some  PulseAudio	 threads  might	 choose	 a  priority a little lower or
       higher than the specified value. Defaults to 5.

       nice-level= The nice level to acquire for the daemon, if	 high-priority
       is  enabled.  Note:  on	some  distributions  X11  uses -10 by default.
       Defaults to -11.

IDLE TIMES
       exit-idle-time= Terminate the daemon after the  last  client  quit  and
       this  time in seconds passed. Use a negative value to disable this fea‐
       ture. Defaults to 20. The --exit-idle-time command  line	 option	 takes
       precedence.

       scache-idle-time=  Unload  autoloaded  sample cache entries after being
       idle for this time in seconds. Defaults to 20.  The  --scache-idle-time
       command line option takes precedence.

PATHS
       dl-search-path=	The  path  were	 to  look  for	dynamic shared objects
       (DSOs/plugins). You may specify more than one path separated by colons.
       The default path depends on compile time settings. The --dl-search-path
       command line option takes precedence.

       default-script-file= The default configuration  script  file  to	 load.
       Specify	an  empty  string  for	not loading a default script file. The
       default behaviour is to load ~/.config/pulse/default.pa,	 and  if  that
       file  does  not	exist  fall  back to the system wide installed version
       /etc/pulse/default.pa.  If   run	  in   system-wide   mode   the	  file
       /etc/pulse/system.pa  is	 used  instead. If -n is passed on the command
       line or default-script-file=  is	 disabled  the	default	 configuration
       script is ignored.

       load-default-script-file= Load the default configuration script file as
       specified in default-script-file=. Defaults to yes.

LOGGING
       log-target= The default log target. Use either  stderr,	syslog,	 auto,
       file:PATH  or  newfile:PATH. auto is equivalent to sylog in case daemo‐
       nize is enabled, otherwise to stderr. If set to file:PATH,  logging  is
       directed	 to  the file indicated by PATH. newfile:PATH is otherwise the
       same as file:PATH, but existing files are  never	 overwritten.  If  the
       specified  file	already	 exists, a suffix is added to the file name to
       avoid overwriting. Defaults to  auto.  The  --log-target	 command  line
       option takes precedence.

       log-level=  Log	level, one of debug, info, notice, warning, error. Log
       messages with a lower log level than specified  here  are  not  logged.
       Defaults	 to  notice.  The --log-level command line option takes prece‐
       dence. The -v command line option might alter this setting.

       log-meta= With each logged message log the code	location  the  message
       was generated from. Defaults to no.

       log-time=  With	each  logged  messages	log  the  relative  time since
       startup. Defaults to no.

       log-backtrace= When greater than 0, with each logged message log a code
       stack trace up the specified number of stack frames. Defaults to 0.

RESOURCE LIMITS
       See  getrlimit(2)  for  more information. Set to -1 if PulseAudio shall
       not touch the resource limit. Not all resource limits are available  on
       all operating systems.

       rlimit-as Defaults to -1.

       rlimit-rss Defaults to -1.

       rlimit-core Defaults to -1.

       rlimit-data Defaults to -1.

       rlimit-fsize Defaults to -1.

       rlimit-nofile Defaults to 256.

       rlimit-stack Defaults to -1.

       rlimit-nproc Defaults to -1.

       rlimit-locks Defaults to -1.

       rlimit-sigpending Defaults to -1.

       rlimit-msgqueue Defaults to -1.

       rlimit-memlock  Defaults	 to  16	 KiB. Please note that the JACK client
       libraries may require more locked memory.

       rlimit-nice Defaults to 31. Please make	sure  that  the	 default  nice
       level  as  configured  with  nice-level fits in this resource limit, if
       high-priority is enabled.

       rlimit-rtprio Defaults to 9. Please make sure that  the	default	 real-
       time  priority level as configured with realtime-priority= fits in this
       resource limit, if realtime-scheduling  is  enabled.  The  JACK	client
       libraries require a real-time prority of 9 by default.

       rlimit-rttime Defaults to 1000000.

DEFAULT DEVICE SETTINGS
       Most  drivers try to open the audio device with these settings and then
       fall back to lower settings. The default settings are CD quality: 16bit
       native endian, 2 channels, 44100 Hz sampling.

       default-sample-format=  The default sampling format. Specify one of u8,
       s16le, s16be, s24le, s24be, s24-32le, s24-32be, s32le, s32be float32le,
       float32be,  ulaw, alaw. Depending on the endianness of the CPU the for‐
       mats s16ne, s16re, s24ne,  s24re,  s24-32ne,  s24-32re,	s32ne,	s32re,
       float32ne,  float32re  (for native, resp. reverse endian) are available
       as aliases.

       default-sample-rate= The default sample frequency.

       default-sample-channels The default number of channels.

       default-channel-map The default channel map.

       alternate-sample-rate The alternate sample frequency. Sinks and sources
       will  use  either  the default-rate-rate value or this alternate value,
       typically 44.1 or 48kHz. Switching between default and alternate values
       is  enabled  only  when the sinks/sources are suspended. This option is
       ignored in passthrough mode where the stream rate will be used. If  set
       to the same as the default sample rate, this feature is disabled.

DEFAULT FRAGMENT SETTINGS
       Some hardware drivers require the hardware playback buffer to be subdi‐
       vided into several fragments. It is possible  to	 change	 these	buffer
       metrics	for  machines with high scheduling latencies. Not all possible
       values that may be configured here are available in all	hardware.  The
       driver  will to find the nearest setting supported. Modern drivers that
       support timer-based scheduling ignore these options.

       default-fragments= The default number of fragments. Defaults to 4.

       default-fragment-size-msec=The duration of a single fragment.  Defaults
       to 25ms (i.e. the total buffer is thus 100ms long).

DEFAULT DEFERRED VOLUME SETTINGS
       With  the flat volume feature enabled, the sink HW volume is set to the
       same level as the highest volume input stream. Any other streams	 (with
       lower  volumes)	have the appropriate adjustment applied in SW to bring
       them to the correct overall level. Sadly hardware mixer changes	cannot
       be timed accurately and thus this change of volumes can sometimes cause
       the resulting output sound to be momentarily too loud or too  soft.  So
       to  ensure  SW  and  HW	volumes	 are  applied concurrently without any
       glitches, their application needs to be synchronized. The  sink	imple‐
       mentation  needs	 to support deferred volumes. The following parameters
       can be used to refine the process.

       enable-deferred-volume= Enable deferred volume for the sinks that  sup‐
       port it. This feature is enabled by default.

       deferred-volume-safety-margin-usec=  The	 amount	 of  time (in usec) by
       which the HW volume increases are delayed and HW volume	decreases  are
       advanced. Defaults to 8000 usec.

       deferred-volume-extra-delay-usec= The amount of time (in usec) by which
       HW volume changes  are  delayed.	 Negative  values  are	also  allowed.
       Defaults to 0.

AUTHORS
       The   PulseAudio	  Developers   <pulseaudio-discuss  (at)  lists	 (dot)
       freedesktop (dot) org>; PulseAudio is  available	 from  http://pulseau‐
       dio.org/

SEE ALSO
       pulse-client.conf(5), default.pa(5), pulseaudio(1), pacmd(1)

Manuals				     User		  pulse-daemon.conf(5)
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